Linotype-slug trimmer.



PATEN TED MAY 26, 1908.

G. B. WALLIN.

LINOTYPE SLUG TRIMMER.

APPLICATION TILED JD'l lY 9, 1907.

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UNITE STATES PATENT orunon GUSTAF E. WALLIN, OF POCATELLO, IDAHO, ASSIGNOR TO THE WALLIN ADDRESSING MA- CHINE MANUFACTURING COMPANY, OF KANSAS CITY,.1\IISSOURI, A CORPORATION OF ARIZONA TERRITORY.

LIN OTYPE-SLUG TRIMMER.

Specification of Letters Patent.

Patented May 26, 1908.

Application filed July 9, 1907. Serial No. 382,855.

T 0 all whom it may concern:

Be it known that LGUsTAF E. WALLIN, a citizen of the United States, residing at P0- catello, in the county of Bannock and State of Idaho, have invented new and useful Improvements in Linotype-Slug Trimmers, of which the following is a specification.

In the type of linotype machine in common use the mold in which the linotype or slug is cast is carried by a vertical intermittentlyrevolving mold wheel or disk. This wheel or disk is mounted upon a part of the frame commonly called the mold-disk slide, and is adjusted in operation first to a position to cooperate with the line of matrices to cast the slug, then moved past a stationary knife to trim the base of the slug, and finally brought into position to cooperate with an ejector whereby the slug is discharged from the mold.

I-Ieretofore it'has been customary to employ a back trimming knife having a straight cutting edge arranged in a plane at right angles to the knife-body and to the slug in thatposition of the path of movement of the slug in which it passes the knife. This form of the knife and arrangement of its cutting edge is objectionable, by reason of the re sistance of the slug to the straight cutting action of the knife, which consequently becomes quickly dulled, whereby the slug is improperly trimmed and frequently doubled up. Moreover, the excess of metal trimmed away accumulates on the back of the mold with obvious disadvantages.

The object of my invention is to overcome these objections and to provide a form and arrangement of knife that will produce a shear cut, whereby the knife will remain sharp for a much longer period, trim the slug cleanly irrespective of its length, operate easily on the slug without strain upon or tendency to shift the slug in the mold, and at the same time cause the shavings to slide laterally off the mold and freely discharge.

In the accompanying drawing illustrating the invention, Figure 1 is a rear elevation of a portion of the revolving mold-carrying disk and a portion of the bearing arm of its supporting slide carrying my improved trimming knife. Fig. 2 is a section on line 22 of Fig. 1.

1 in the drawing represents the vertical intermittently-revolving mold wheel or disk centrally supported by a journal revolving in an arm 2 projecting laterally from that part of the frame commonly called the mold-wheel slide. Carried by the disk is the slotted mold 3 in which the linotype or slug 4 is cast, its forward edge bearing the letters or characters, and its rear edge, which is broken away from the mouth of the melting pot, being raised and protruding slightly beyond the rear face of the mold. The purpose of the trimming knife is to shave or trim this rough or ragged base of the slug exactly flush with the rearface of the mold as a guide or gage in the trimming action.

The arm 2 is provided with a lateral bracket or extension 5 formed with a pair of spaced lugs 6, and carries the trimming knife 7, comprising a body portion or shank 8 and a blade 9. The body portion or shank 8 rests upon the outer face of the bracket 5 and is formed with slots 10 for the passage of screws or like fastenings 11, whereby the knife is mounted for sliding movement on the bracket and is adapted to be fixed by the screws in adjusted position. Adjusting or set screws 12 work 'in threaded openings in the lugs 6 and bear upon the back edge of the shank 8, whereby the knife is reinforced from back strain during the shaving operation and is adapted to be adjusted forwardly when the screws 11 are loosened,.the said screws 12 being provided with angular heads for the application of a wrench or like tool. After the knife has been adjusted to the proper extent the screws 11 are tightened to fix it in adjusted position. Of course it will be understood that the screws 12 may work in threaded openings in the back of the knife to adjust the latter positively in both directions. The blade 9 of the knife projects obliquely or at such an angle to the shank 8 as to incline toward the rear faces of the disk and mold, and the cutting edge 11 of said blade is disposed. diagonally or obliquely thereto, the blade being approximately of triangular form with the cutting edge con: stituting one of its sides extending the full distance from the point or vertex to the rear end or base thereof.

In operation, it will be understood that when the disk is moved to carry the slug toward and past the trimming knife, the edge 11 of the blade will longitudinally trim the base of the slug or cut away the rough portions thereof flush with the rear surface of the mold. In this action the oblique cutting edge of the blade exerts a shear cut on the metal, whereby the slug is easily and cleanly trimmed without the resistance encountered when the ordinary straight cut'knife is employed, and hence without liability of the slug buckling and being imperfectly trimmed. The shear cutting action of the blade further reduces the amount of wear and tear upon the cutting edge, whereby the knife is adapted to be used for a longer period without the cutting edge becoming dull. The trimmings are also guided and caused by the shear action from the oblique disposition of the cutting edge to slide laterally of the mold and discharge or drop down upon one side thereof, thus preventing the metal from accumulating upon the back of the mold.

Having thus described the invention, what I claim, is

In a slug trimming mechanism for linotype machines, the combination of a revoluble mold wheel or disk, a supporting arm the mold wheel, and said blade being disposed parallel with the back of the mold to slide thereon as the wheel revolves and provided with a beveled cutting edge arranged obliquely thereto and to the mold, and

means associated with the body portion to 5;"

adjust the knife on the bracket toward and from the mold wheel.

In testimony whereof, I affix my signature in presence of two witnesses.

GUSTAF E. WALLIN.

Witnesses GUY T. NIoI-IoLs, I. S. WEAVER. 

